1 files changed, 38 insertions, 0 deletions
diff --git a/Include/internal/pycore_frame.h b/Include/internal/pycore_frame.h
new file mode 100644
index 00000000000..44f58fb6948
--- /dev/null
+++ b/Include/internal/pycore_frame.h
@@ -0,0 +1,38 @@
+#ifndef Py_INTERNAL_FRAME_H
+#define Py_INTERNAL_FRAME_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum {
+    FRAME_SPECIALS_GLOBALS_OFFSET = 0,
+    FRAME_SPECIALS_BUILTINS_OFFSET = 1,
+    FRAME_SPECIALS_LOCALS_OFFSET = 2,
+    FRAME_SPECIALS_SIZE = 3
+};
+
+static inline PyObject **
+_PyFrame_Specials(PyFrameObject *f) {
+    return &f->f_valuestack[-FRAME_SPECIALS_SIZE];
+}
+
+/* Returns a *borrowed* reference. */
+static inline PyObject *
+_PyFrame_GetGlobals(PyFrameObject *f)
+{
+    return _PyFrame_Specials(f)[FRAME_SPECIALS_GLOBALS_OFFSET];
+}
+
+/* Returns a *borrowed* reference. */
+static inline PyObject *
+_PyFrame_GetBuiltins(PyFrameObject *f)
+{
+    return _PyFrame_Specials(f)[FRAME_SPECIALS_BUILTINS_OFFSET];
+}
+
+int _PyFrame_TakeLocals(PyFrameObject *f);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_INTERNAL_FRAME_H */